Yonenaga

Hiroichi Yonenaga, Tokyo JP

Patent application number

Description

Published

20100182081

Feedforward distortion compensation amplifier - A feedforward distortion compensation amplifier includes an adjusting unit for adjusting a gain and a phase of an input signal, a first amplifier for amplifying a signal outputted from the adjusting unit, a delay unit for delaying the input signal, and a coupler for coupling a signal outputted from the delay unit to a signal outputted from the first amplifier. The feedforward distortion compensation amplifier further includes a first controller which detects a distortion component of the first amplifier to control an operation of the adjusting unit based on the distortion component, and a second controller which determines one distortion level from distortion levels based on a magnitude of the input signal, and compares the determined distortion level with the detected distortion component of the first amplifier to control an amplification rate of the first amplifier based on comparison results.

OPTICAL COMMUNICATION APPARATUS, OPTICAL ROUTE SWITCHING APPARATUS AND NETWORK - An optical communication apparatus, in the sending side, distributes client signals according to destinations and a communication capacity of each destination, electrical-to-optical converts the distributed signals to optical signals having different center frequencies, and multiplexes the optical signals to output, and in the receiving side, the optical communication apparatus divides the wavelength division multiplexed signal to each wavelength (for each sending source), optical-to-electrical converts the divided optical signals to electrical signals, and multiplexes the electrical signals to output. An add/drop port of an optical route switching apparatus includes an input/output port to the optical communication apparatus, and an optical frequency bandwidth is variable according to an optical spectrum width of the optical signal. A network is constructed by using the optical communication apparatus and the optical route switching apparatus.

BANDWIDTH VARIABLE COMMUNICATION APPARATUS AND BANDWIDTH VARIABLE COMMUNICATION METHOD - A bandwidth variable communication apparatus includes: a route exchange unit including a route exchange function for switching an output port of a stream signal of one or more wavelengths input from an input port based on both or a part of wavelength and time, and including a bandwidth change function for changing passable frequency bandwidth in a section from the input port to the output port through which the stream signal passes; and a control unit including a control information transmit-receive function for transmitting and receiving control information for both or a part of the route exchange function and the bandwidth change function of the route exchange unit, and including a control function for controlling the route exchange unit based on the control information. All or a part of the input ports and the output ports are connected to other communication apparatuses via transmission routes.

07-07-2011

Kazushige Yonenaga, Tokyo JP

Patent application number

Description

Published

20140126905

MULTI-FLOW OPTICAL TRANSCEIVER, MULTI-FLOW OPTICAL TRANSPONDER AND MULTI-FLOW OPTICAL NODE - A multi-flow optical transceiver provided with a plurality of wavelength-tunable light sources, a plurality of optical modulation units which modulates light with an input signal, an optical multiplexing/demultiplexing switch which couples light from at least one of the wavelength-tunable light sources to at least one of the optical modulation units with any power, and an optical coupling unit which couples a plurality of lights, modulated by a plurality of the optical modulation units, to at least one waveguide.

05-08-2014

Kohtaroh Yonenaga, Kanagawa JP

Patent application number

Description

Published

20090073247

Method, apparatus, and system for forming image - An image forming apparatus connectable to a first feed tray and a second feed tray includes an image forming unit, a feed path, and a detecting unit provided on the feed path to sense recording medium jam. An identifying unit identifies a feed path and a feed tray where recording medium jam has occurred as a jammed path and a jamming feed tray. A first determining unit determines whether the image forming apparatus is connected to the second feed tray. A second determining unit determines whether the second feed tray can feed a recording medium to the image forming unit. A feeding unit feeds a recording medium from the second feed tray to the image forming unit.

03-19-2009

Osamu Yonenaga, Tokyo JP

Patent application number

Description

Published

20130240777

HIGHLY THERMAL-CONDUCTIVE POLYIMIDE FILM CONTAINING GRAPHITE POWDER - To obtain a thermal-conductive polyimide film having excellent mechanical characteristics, heat resistance, and the like, and additionally being excellent in thermal conductivity in the planar direction, having anisotropy in thermal conductivity between the planar direction and the thickness direction, and being excellent also in tear strength and moldability.

09-19-2013

Takeshi Yonenaga, Kanazawa-Shi JP

Patent application number

Description

Published

20080302208

COOLING DEVICE FOR TABLE PLATE OF ROTARY INDEXING APPARATUS - A table plate has a coolant channel including at least a pipe that is in contact with at least one of a back surface and an outer peripheral surface of the table plate or a path disposed in the table plate. At least a portion of the coolant channel is in areas outside a reference hole, which is formed in the table plate coaxially with the rotating shaft, the areas corresponding to two or more of four quadrants, which are defined by two perpendicular lines intersecting at an axial center of the rotating shaft in a plan view. The coolant channel has inlet and outlet ends that open in the outer peripheral surface of the table plate or an outer peripheral surface of the rotating shaft. The inlet and outlet ends are respectively connected to a coolant-supplying path and a coolant-collecting path through a rotary joint.

12-11-2008

20100176545

BREAKAGE PREVENTING DEVICE FOR TILTING TABLE INDEXING DEVICE - In a tilting table indexing device driven by a direct-drive motor, a tilting table is prevented from rotating beyond an allowable rotation range when power is shut off in an emergency, such as power outage, and thus a breakage accident of, for example, a tool or a workpiece is reliably prevented from occurring. In a tilting table indexing device (

07-15-2010

Tomihiro Yonenaga, Nirasaki-Shi JP

Patent application number

Description

Published

20110210117

HEAT TREATMENT APPARATUS - Provided is a heat treatment apparatus which, when simultaneously heating substrates placed on susceptors, is capable of controlling the uniformity of temperature within each substrate. The heat treatment apparatus includes: a reaction tube which performs predetermined treatment to wafers; a plurality of susceptors each of which has a mounting surface for mounting the wafer and is made of a conductive material; a rotatable quartz boat wherein the susceptors spaced apart in a direction perpendicular to the mounting surfaces are arranged and supported in the reaction tube; a magnetic field generating unit which is arranged on a sidewall of the processing chamber and includes a pair of electromagnets which generate an AC magnetic field in a direction parallel to the mounting surfaces of the susceptors and inductively heat the susceptors; and a control unit which controls the AC magnetic field generated by the magnetic field generating unit.

09-01-2011

20110248024

HEAT TREATMENT APPARATUS - In-plane temperature of each substrate is uniformly controlled at the time of heating substrates placed on a plurality of susceptors, respectively. A heat treatment apparatus is provided with susceptors, i.e., conductive members for placing wafers thereon, having an induction heating body electrically divided into a center portion thereof and a peripheral portion thereof; a quartz boat supporting the susceptors arranged in a row; an induction coil, which is arranged inside a processing chamber to surround the circumference of each of the susceptors and configured such that the temperature of the induction coil can be freely adjusted; and a control unit which performs temperature control by changing the ratio between heat value at the center portion of the induction heating body and that at the peripheral portion, by controlling two high frequency currents of different frequencies to be applied to the induction coil from a high frequency current circuit.

10-13-2011

Tomihiro Yonenaga, Nirasaki City JP

Patent application number

Description

Published

20150093518

HEAT TREATMENT APPARATUS AND HEAT TREATMENT METHOD - The present disclosure provides an apparatus of performing a heat treatment with respect to a substrate mounted within a processing vessel, including: a substrate mounting stand including an inner portion configured to transfer heat to a central portion of the substrate and a heat generation regulating portion configured to generate heat through an induction heating; a magnetic field forming mechanism configured to form magnetic fields with alternating current power and to inductively heat the heat generation regulating portion; a power supply unit configured to supply the alternating current power to the magnetic field forming mechanism; a temperature measuring unit configured to measure a temperature of the heat generation regulating portion; a control unit configured to control the alternating current power; and a gas supply unit configured to supply a treatment gas to the substrate mounted on the mounting stand.